基于D2D通信的V2X资源分配方案

针对基于设备到设备(D2D)的汽车间通信复用蜂窝资源带来的干扰问题,考虑在满足车辆用户(V-UEs)的通信要求下,通过一个启发式算法最大化蜂窝用户(C-UEs)总的吞吐量.首先通过图着色原理将没有干扰的车辆分在同一簇;其次根据分簇结果,利用改进的匈牙利指派算法为V-UEs分配信道;最后通过调整功率最大化C-UEs总的吞吐量.仿真结果表明,此算法能够很好地解决车通信(V2X)的同层干扰和跨层干扰问题,在保证V-UEs通信可靠性的前提下,提高了频谱利用率.

V2 X Resource Allocation Scheme Based on D2 D Communication

Large amount of interference, due to share the cellular network resources, exists in device-to-device (D2D) based vehicular communication system with heavy load. A heuristic algorithm is proposed to maximize the total throughput of cellular-users ( C-UEs) while meeting the minimum security communi-cation requirements of vehicular-users ( V-UEs) at the same time. Firstly, the vehicles without interfer-ence are divided into the same cluster by principle of graph coloring. Secondly, according to the cluste-ring results, the improved Hungarian assignment algorithm is used to allocate the channel. Finally, the power is adjusted to maximize total throughput of C-UEs. Simulations show that the proposed algorithm can effectively solve the vehicle-to-everything (V2X) co-layer and cross-layer interference problem, and improve the spectrum utilization so as to ensure the reliability of V-UEs communication.